Lamp assembly, light supplying apparatus and liquid crystal display device using the same

ABSTRACT

A lamp assembly, light supplying module and LCD device using the same are provided. The LCD device includes the light-supplying module for generating a first light, a light distribution-changing module for receiving the first light and changing the optical characteristics of the first light to output a second light, and a display module for receiving the second light having improved optical characteristics, the light distribution-changing module being coupled to the light-supplying module by means of a first engaging member, the display module being coupled in the light distribution-changing module by means of a second engaging member, and the display module, light distribution-changing module and light-supplying module being coupled to each other by means of a third engaging member. Therefore, each component of the LCD device having above structure is easily separated, replaced and easily repaired.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The disclosure relates to a lamp assembly, a light supplyingapparatus and a liquid crystal display device using the same.

[0003] 2. Description of the Related Art

[0004] Liquid crystal display (LCD) devices are display devices thatdisplay images by means of liquid crystal.

[0005] Since the LCD devices have smaller dimension, lighter weight, andbetter display quality compared with other display devices, the LCDdevices are widely used as display devices for information processingdevices.

[0006] The liquid crystal of the LCD devices does not generate lights,but adjusts transmissivity of light. Accordingly, the LCD devicesrequire a light source so as to display images.

[0007] The LCD devices may use an external light so as to displayimages. However, the LCD devices using the external light are not ableto display images in a place where the external light is not provided,for example, in a dark environment. The recent LCD devices employlamp(s) for generating lights so as to display images in a place wherethe external light is not provided.

[0008] The lamps used for the LCD devices require a long life expectancyand generate a small amount of light. Cold cathode ray fluorescent lamps(CCFLs) satisfy such requirements, and are employed as a light source inthe LCD devices.

[0009] However, the CCFLs may not be used eternally, and should bereplaced by new CCFLs after used for a certain period, for example,about 10,000 hours to 100,000 hours. Further, the CCFLs have a fataleffect on the display quality of the LCD devices, especially in the LCDdevices having a large screen, when the CCFLs almost reach the lifeexpectancy. The reason is that the LCD devices having the large screenuse much more CCFLs than the LCD devices having a small screen.

[0010] Furthermore, since the CCFLs are arranged inside the LCD devices,the LCD devices should be disassembled into their components to replaceold CCFLs that reach the life expectancy with new CCFLs and thenassembled to be used. It is not easy to replace the old CCFLs with thenew CCFLs.

[0011] Recently, the LCD devices have been developed to have a screensize of more than 30 or 40 inches.

[0012] The number of components of the LCD devices having a large screenis much more than that of the LCD devices having a small screen.Accordingly, the LCD devices employing the CCFLs require lots of effortsand increased time for replacement of the CCFLs.

[0013] Therefore, a need exits for LCD devices capable of easilyreplacing consumable components such as lamps and reducing the timetaken for replacing old CCFLs with new CCFLs.

BRIEF SUMMARY OF THE INVENTION

[0014] Accordingly, the present invention provides a lamp assembly inwhich the number of components of the lamp assembly is minimized, anassembling process is simplified and lamps are easily replaced.

[0015] The present invention provides a light supplying apparatus havinga lamp assembly in which the number of components of the LCD device isminimized, an assembling process is simplified and lamps are easilyreplaced.

[0016] The present invention provides a liquid crystal display device inwhich lamps are replaced by a simplified disassembling process, and aliquid crystal display panel and an optical sheet are not stained withfingerprint and contaminants during the disassembling process.

[0017] According to one aspect of the invention, there is provided alamp assembly comprising: at least two lamps, each of the lampsincluding: a lamp body including a fluorescent layer formed on an innersurface of the lamp body and a discharge gas disposed in the lamp body;a first electrode for providing the lamp body with a first dischargevoltage; and a second electrode for providing the lamp body with asecond discharge voltage; and a first board, coupled to the firstelectrode, for providing the first electrode with the first dischargevoltage.

[0018] According to another aspect of the invention, there is provided alight supplying apparatus comprising: a receiving container including abottom face, a first side wall, a second side wall facing the first sidewall, a third sidewall and a fourth sidewall facing the third side wall,each of the sidewalls being extended from an edge of the bottom face toform a receiving space; first and second lamp assembly-fixing membersdisposed on the bottom face of the receiving container, the first lampassembly-fixing member being adjacent to the first sidewall, the secondlamp assembly-fixing member being adjacent to the second sidewall, thefirst and second lamp assembly-fixing members having a bar shape, firstrecess and second recesses being formed on upper faces of the first andsecond lamp assembly-fixing members, and the upper faces being oppositeto the bottom face of the receiving container; a reflection memberpartially inserted into a slot of the first and second lampassembly-fixing members being opposite to the bottom face of thereceiving container; a lamp assembly, including: first and secondboards, the first and the second boards being inserted into the firstand the second recesses of the first and second lamp assembly-fixingmembers, respectively; and a lamp having first and second electrodes,the first and second electrodes being connected with the first andsecond boards, respectively; and first and second insulated members forcovering the first and second lamp assembly-fixing members,respectively, and for insulating the first and second boards.

[0019] According to further aspect of the invention there is provided aliquid crystal display device comprising: a light supplying member,including: a lamp assembly for generating a first light; and a receivingcontainer having a bottom face for receiving the lamp assembly, and aplurality of sidewalls; a light distribution-changing member, including:an optical sheet for changing optical distribution of the first light toproduce a second light; a first optical sheet-fixing member forreceiving an edge of a bottom face of the optical sheet; a secondoptical sheet-fixing member having first and second faces, the firstface pressing an edge of an upper face of the optical sheet, and thesecond face being bent to be connected one of the sidewalls of thereceiving container; and a first engaging member for engaging the firstoptical sheet-fixing member with the second optical sheet-fixing member;a second engaging member for engaging one of the sidewalls of thereceiving container with the second face of the second opticalsheet-fixing member; a display unit, including: a liquid crystal displaypanel, disposed on the first face of the second optical sheet-fixingmember to be opposite to the optical sheet, for changing the secondlight into a third light having image information; and a fixing memberfor fixing the liquid crystal display panel, the fixing member having athird face and a fourth face, the third face pressing an edge of theliquid crystal display panel, and the fourth face being bent to beconnected to one of the sidewalls of the receiving container; a thirdengaging member for engaging the first face of the second opticalsheet-fixing member with the third face of the fixing member; and afourth engaging member for engaging one of the sidewalls of thereceiving container, with the second face of the second opticalsheet-fixing member and the fourth face of the fixing member.

[0020] According to the present invention, the liquid crystal displaydevice may be disassembled into each module (component), such as adisplay module, a light distribution-changing module and alight-supplying module. Thus each expendable component, such as a lampassembly, may be easily replaced with new component by a simplifieddisassembling process.

[0021] Therefore, the time required for disassembling the components ofthe liquid crystal display device may be remarkably reduced. Inaddition, the number of components may be remarkably reduced, to therebyremarkably reduce a manufacturing cost.

[0022] The liquid crystal display device according to the presentinvention may be useful for a television having a large screen.

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other advantages of the present invention willbecome more apparent by describing in detail exemplary embodimentsthereof with reference to the accompanying drawings, in which:

[0024]FIG. 1 is a perspective view showing a lamp assembly according toa first exemplary embodiment of the present invention;

[0025]FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;

[0026]FIG. 3 is an exploded perspective view showing a first board, asecond board and lamps of FIG. 1;

[0027]FIG. 4A is an exploded perspective view showing a bottom chassisand an optical sheet-fixing block of a light-supplying module accordingto a second exemplary embodiment of the present invention;

[0028]FIG. 4B is a perspective view showing the optical sheet-fixingblock of FIG. 4A;

[0029]FIG. 5A is a perspective view showing a reflection plate and alamp assembly-fixing block of the light-supplying module according tothe second exemplary embodiment of the present invention;

[0030]FIG. 5B is a perspective view showing the lamp assembly-fixingblock of FIG. 5A;

[0031]FIG. 6 is a perspective view showing a bottom surface of anassembled structure of the lamp assembly-fixing block and the reflectionplate of FIG. 5A;

[0032]FIG. 7A is a perspective view showing an assembled structure ofthe reflection plate, the lamp assembly-fixing block and the lightassembly according to the second exemplary embodiment of the presentinvention;

[0033]FIG. 7B is an enlarged view of ‘A’ in FIG. 7A;

[0034]FIG. 8 is a perspective view showing an assembled structure of aninsulated frame, the reflection plate, the lamp assembly-fixing block,and the light assembly according to the second exemplary embodiment ofthe present invention;

[0035]FIG. 9 is an exploded perspective view of FIG. 8;

[0036]FIG. 10 is a perspective view showing the light-supplying moduleaccording to the second exemplary embodiment of the present invention;

[0037]FIG. 11 is a cross-sectional view taken along B-B of FIG. 10;

[0038]FIG. 12 is a cross-sectional view taken along C-C of FIG. 10;

[0039]FIG. 13 is a schematic view showing a liquid crystal displaydevice according to a third exemplary embodiment of the presentinvention;

[0040]FIG. 14 is a schematic view showing the liquid crystal displaydevice divided into a first part having the light-supplying module and asecond part having the light distribution-changing module and thedisplay module of FIG. 13;

[0041]FIG. 15 is a schematic view showing the liquid crystal displaydevice divided into the light-supplying module, the lightdistribution-changing module and the display module of FIG. 13;

[0042]FIG. 16 is an exploded perspective view showing the lightdistribution-changing module of FIG. 13;

[0043]FIG. 17 is a cross-sectional view showing a first opticalsheet-fixing chassis of FIG. 16;

[0044]FIG. 18 is a cross-sectional view showing an assembled structureof the first optical sheet-fixing chassis, an optical sheet and a secondoptical sheet-fixing chassis according to the third exemplary embodimentof the present invention;

[0045]FIG. 19 is a perspective view showing the second opticalsheet-fixing chassis of FIG. 18;

[0046]FIG. 20 is a perspective view showing an assembled structure ofthe light distribution-changing module and the display module accordingto the third exemplary embodiment of the present invention;

[0047]FIG. 21 is an exploded cross-sectional view showing the assembledstructure of FIG. 20.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0048]FIG. 1 is a perspective view showing a lamp assembly according toa first exemplary embodiment of the present invention.

[0049] Referring to FIG. 1, a lamp assembly 100 includes a first board120 and a second board 130. An inverter module 140 may be included inthe lamp assembly 100.

[0050] At least two lamps 110 are used in the lamp assembly 100, andeach of the lamps 100 is arranged in parallel each other.

[0051] Each of the lamps 110 has a lamp body 111, a first electrode 112and a second electrode 113.

[0052]FIG. 2 is a cross-sectional view taken along A-A of FIG. 1.

[0053] Referring to FIG. 1 and FIG. 2, the lamp body 111 is comprised ofmaterial having high transmissivity of light, and has a tube shape. Bothends of the lamp body 111 are opened.

[0054] The lamp body 111 includes a discharge gas 111 a and afluorescent layer 111 b.

[0055] The discharge gas 111 a is injected into the lamp body 111 by apredetermined pressure. The discharge gas 111 a is dissociated intoatoms, neutrons and electrons through an electric discharging process.

[0056] Fluorescent material is coated on an inner surface of the lampbody 111 to form the fluorescent layer 111 b. The fluorescent layer 111b is activated by the electrons to generate a visible ray.

[0057] The first electrode 112 and the second electrode 113 causeelectric discharge to dissociate the discharge gas in the lamp body 111.

[0058] The first electrode 112 includes a first lead line 112 a, a firstelectrode body 112 b and a first sealing glass 112 c.

[0059] The first lead line 112 a is comprised of nickel or copper, andhas a shape of rod.

[0060] The first sealing glass 112 c has a cylinder shape to be tightlyinserted in the inner surface of the lamp body 111. The first sealingglass 112 c has a through-hole, and the first lead line 112 a isinserted in the first sealing glass 112 c through the through-hole.

[0061] The first electrode body 112 b is formed at one end of the firstlead line 112 a of the lamp body 111. The first electrode body 112 b iscomprised of conductive material, such as nickel or copper, and has acylinder shape so as to easily release electrons. A first dischargevoltage is applied to the first lead line 112 a.

[0062] The first electrode 112 may be an internal electrode, or anexternal electrode where the first electrode 112 is disposed on anoutside of the lamp body 111.

[0063] The second electrode 113 includes a second lead line 113 a, asecond electrode body 113 b and a second sealing glass 113 c.

[0064] The second lead line 113 a is comprised of nickel or copper, andhas a shape of rod.

[0065] The second sealing glass 113 c has a cylinder shape to be tightlyinserted in the inner surface of the lamp body 111. The second sealingglass 113 c has a through-hole, and the second lead line 113 a isinserted in the second sealing glass 113 c through the through-hole.

[0066] The second electrode body 113 b is formed on one end of thesecond lead line 113 a of the lamp body 111. The second electrode body113 b comprises conductive material, such as nickel or copper, and has acylinder shape so as to easily release electrons. A second dischargevoltage is applied to the second lead line 113 a.

[0067] The second electrode 113 may be an internal electrode, or anexternal electrode where the second electrode 113 is disposed outside ofthe lamp body 111.

[0068] The first discharge voltage applied to the first electrode 112 isdifferent from the second discharge voltage applied to the secondelectrode 113.

[0069] Specifically, the voltage difference between the first and seconddischarge voltages is large enough to cause electric discharge.

[0070] The first board 120 and the second board 130 apply the first andsecond discharge voltages to the first and second lead lines 112 a and113 a of the first and second electrodes 112 and 113 so as tosimultaneously turn on the lamps 110.

[0071]FIG. 3 is an exploded perspective view showing a first board, asecond board and lamps of FIG. 1.

[0072] Referring to FIG. 3, the first (or second) board 120 (or 130)includes a first (or second) board body 121 (or 131), at least one first(or second) conductive pattern 123 (or 133), at least two first (orsecond) through-holes 125 (or 135), at least two first (or second) lampholders 127 (or 137) and a first (or second) connector 129 (or 139).

[0073] Preferably, the first board body 121 includes a printed circuitboard. The first conductive pattern 123 is formed on the first boardbody 121. A length of the first conductive pattern 123 is longer than adistance between the first electrodes of adjacent lamps.

[0074] Each of the first through-holes 125 is formed in the firstconductive pattern 123. Each of the first through-holes 125 is formed ata portion of the first conductive pattern 123, to which the firstelectrode 112 is contacted. The number of the through-holes 125 is atleast the number of the lamps 110. For example, the first board body 121may have, for example, four first through-holes 125.

[0075] The first (or second) electrode 112 (or 113), one of the first(or second) through-holes 125 (or 135) and the fist (or second)conductive pattern 123 (or 135) may be electrically connected each otherby a soldering or a clip.

[0076] The first lamp holders 127 are comprised of rubber, and have aninner surface of a cylinder shape and an external surface of a cubicshape. An outer surface of the lamp body 111 is inserted into the innersurface of the first lamp holders 127. One end of the first lamp holders127 is attached to the first board body 121.

[0077] The first (or second) lead line 112 a (or 113 a) maintains a gapof about 1 mm with the first (or second board body) 121 (or 131) by thefirst (or second) lamp holders 127 (or 137). The first (or second) lampholder 127 (or 137) protects the first (or second) lead line 112 a (or113 a) from an external impact or vibration.

[0078] The first (or second) connector 129 (or 139) is connected to thefirst (or second) conductive pattern 123 (or 133). The inverter module140 is connected to the first connector 129 and the second connector139.

[0079] Referring again to FIG. 1, the inverter module 140 includes aninverter 141, a first line 142 for applying the first discharge voltageto the first electrode 112, a second line 143 for applying the seconddischarge voltage to the second electrode 113, a first terminal 144, asecond terminal 145 and an inverter control board 147.

[0080] The inverter 141 generates and applies the first and seconddischarge voltages to the first and second lines 142 and 143. The firstand second lines 142 and 143 apply the first and second dischargevoltages to the first and second electrodes 112 and 113, through thefirst and second terminals 144 and 145 and the first and secondconnectors 129 and 139 connected to the first and second terminals 144and 145, respectively.

[0081] The inverter control board 147 controls the inverter 141.Specifically, the inverter control board 147 controls the timing forapplying the first and second discharge voltages to the first and secondelectrodes 112 and 113, and the amplitude of the first and seconddischarge voltages.

[0082] In a second exemplary embodiment of the present invention, alight-supplying apparatus using the lamp assembly of the firstembodiment is explained.

[0083]FIG. 4A is an exploded perspective view showing a bottom chassisand an optical sheet-fixing block of a light-supplying module accordingto a second exemplary embodiment of the present invention. FIG. 4B is aperspective view showing the optical sheet-fixing block according to thesecond exemplary embodiment of the present invention.

[0084] Referring to FIG. 4A, a bottom chassis 200 includes a bottom face210 and a plurality of sidewalls 220, and is comprised of metal having astrong intensity.

[0085] The bottom face 210 may have a rectangular shape in which alength (L) is longer than a width (W), and has four bottom edges.

[0086] Each sidewall of the sidewalls 220 is extended to one directionfrom each of the bottom edges, to thereby form a receiving space.

[0087] The sidewalls 220 include a first sidewall 222, a second sidewall224, a third sidewall 226 and a fourth sidewall 228. The first sidewall222 and the second sidewall 224 have the length (L), and face eachother. The third sidewall 226 and the fourth sidewall 228 have the width(W), and face each other.

[0088] The bottom face 210 has a plurality of first engaging holes 211.The first engaging holes 211 are formed along a line on a portion of thebottom face 210, which is apart from a first edge on which the firstsidewall 222 and the bottom face 210 meet.

[0089] The bottom face 210 has a plurality of second engaging holes 212.The second engaging holes 212 are formed straight on a portion of thebottom face 210, which is apart from a second edge on which the secondsidewall 224 and the bottom face 210 meet.

[0090] The bottom face 210 has a plurality of fifth engaging holes 213.The fifth engaging holes 213 are formed straight on a portion of thebottom face 210, which is apart from a third edge on which the thirdsidewall 226 and the bottom face 210 meet.

[0091] The bottom face 210 has a plurality of sixth engaging holes 214.The sixth engaging holes 214 are formed straight on a portion of thebottom face 210, which is apart from a fourth edge on which the fourthsidewall 228 and the bottom face 210 meet.

[0092] The bottom face 210 also has a plurality of seventh engagingholes 215 for fixing the inverter control board 147 (in FIG. 1). Theseventh engaging holes 215 are formed in front of the sixth engagingholes 214 on the bottom face 210.

[0093] The reference numeral 220 a represents a plurality of eighthengaging holes that is formed on a lower portion of the first, second,third and fourth sidewalls 222, 224, 226, 228 to be coupled with anoptical sheet-fixing chassis. The reference numeral 220 b represents aplurality of ninth engaging holes that is formed on an upper portion ofthe first, second, third and fourth sidewalls 222, 224, 226, 228 to becoupled with an LCD panel-fixing chassis.

[0094] Referring to FIG. 4A and FIG. 4B, an optical sheet-fixing block300 includes a first optical sheet-fixing block 350 and a second opticalsheet-fixing block 390.

[0095] Each of the first optical sheet-fixing block 350 and the secondoptical sheet-fixing block 390 has a bar shape with a slant side face.

[0096] Referring to FIG. 4A, the first optical sheet-fixing block 350 isdisposed parallel to the first edge formed by the bottom face 210 andthe first sidewall 222.

[0097] Referring to FIG. 4B, the first optical sheet-fixing block 350includes a first side surface 351, a second side surface 352, a thirdside surface 353, a fourth side surface 354, a first bottom surface 355contacting the bottom face 210 of the bottom chassis 220, a first uppersurface 356 opposite the first bottom surface 355, and a first steppedportion 357.

[0098] The first side surface 351 contacts tightly to the first sidewall222. The second side surface 352 is inclined and faces the first sidesurface 351.

[0099] The third side surface 353 faces the third sidewall 226 of thebottom chassis 200, and the fourth side surface 354 faces the fourthsidewall 228 of the bottom chassis 200.

[0100] The third side surface 353 maintains a first gap (G1) with thethird sidewall 226 of the bottom chassis 200, and the fourth sidesurface 354 maintains a second gap (G2) with the fourth sidewall 228 ofthe bottom chassis 200.

[0101] A first stepped portion 357 is formed parallel to a fifth edgeformed by the first upper surface 356 and the second side surface 352.

[0102] As shown in FIGS. 4A and 4B, third engaging holes 356 a areformed on the first upper surface 356 so as to fix the first opticalsheet-fixing block 350 to the bottom chassis 200. First screws 356 b areinserted into the corresponding third engaging holes 356 a, and areinserted into the corresponding first engaging holes 211 of the bottomchassis 200.

[0103] Referring again to FIG. 4A, the second optical sheet-fixing block390 is disposed parallel to the second edge formed by the bottom face210 and the second sidewall 224.

[0104] Referring again to FIG. 4B, the second optical sheet-fixing block390 includes a fifth side surface 391, a sixth side surface 392, aseventh side surface 393, an eighth side surface 394, a second bottomsurface 395 contacting the bottom face 210 of the bottom chassis 220, asecond upper surface 396 facing the second bottom surface 395, and asecond stepped portion 397.

[0105] The fifth side surface 391 contacts tightly to the secondsidewall 224. The sixth side surface 392 is inclined and faces the fifthside surface 391.

[0106] The seventh side surface 393 faces the third sidewall 226 of thebottom chassis 200, and the eighth side surface 394 faces the fourthsidewall 228 of the bottom chassis 200.

[0107] The seventh side surface 393 maintains the first gap (G1) withthe third sidewall 226 of the bottom chassis 200, and the eighth sidesurface 394 maintains the second gap (G2) with the fourth sidewall 228of the bottom chassis 200.

[0108] A second stepped portion 397 is formed parallel to a sixth edgeformed by the second upper surface 396 of the second opticalsheet-fixing block 390 and the sixth side surface 392.

[0109] As shown in FIGS. 4A and 4B, fourth engaging holes 396 a areformed on the second upper surface 396 of the second opticalsheet-fixing block 390 so as to fix the second optical sheet-fixingblock 390 to the bottom chassis 200. Second screws 396 b are insertedinto the corresponding fourth engaging holes 396 a, and are insertedinto the corresponding second engaging holes 212 of the bottom face 210of the bottom chassis 200.

[0110]FIG. 5A is a perspective view showing a reflection plate and alamp assembly-fixing block of the light supplying module according tothe second exemplary embodiment of the present invention, and FIG. 5B isa perspective view showing the lamp assembly-fixing block of FIG. 5A.

[0111] Referring to FIG. 5A, a lamp assembly-fixing block 400 is coupledto a reflection plate 500.

[0112] The lamp assembly-fixing block 400 includes a first lampassembly-fixing block 450 and a second lamp assembly-fixing block 490.

[0113] Each of the first lamp assembly-fixing block 450 and the secondlamp assembly-fixing block 490 has a rectangular parallelepiped shape.

[0114] Referring to FIG. 5B, the first lamp assembly-fixing block 450includes a ninth side surface 451, a tenth side surface 452, an eleventhside surface 453, a twelfth side surface 454, a third bottom surface 455and a third upper surface 456.

[0115] The ninth side surface 451 contacts tightly to the third sidewall226 of the bottom chassis 200 (in FIG. 4A), the tenth side surface 452faces the ninth side surface 451.

[0116] The eleventh side surface 453 contacts tightly to the firstsidewall 222 of the bottom chassis 200, the twelfth side surface 454contacts tightly to the second sidewall 224 of the bottom chassis 200.

[0117] The third bottom surface 455 contacts tightly to the bottom face210 of the bottom chassis 200. The third upper surface 456 faces thethird bottom surface 455.

[0118] The third upper surface 456 has first through-holes 456 a andfirst grooves 456 b. The first grooves 456 b receive the first board 120of the lamp assembly 100 (in FIG. 1).

[0119] The first connector 129 of the first board 120 is inserted intothe first through-holes 456 a.

[0120] The third bottom surface 455 is communicated with the third uppersurface 456 by the first through-holes 456 a such that the firstterminal 144 is coupled to the first connector 129 (in FIG. 1).

[0121] The first grooves 456 b are communicated with the firstthrough-holes 456 a, and are formed on the third upper surface 456toward the third bottom surface 455 to have a predetermined depth.

[0122] The first grooves 456 b receive the first board 120 having a highoperating voltage and insulate the first board 120.

[0123] The number of the first grooves 456 b is the same as the numberof the first boards 120. Each of the first grooves 456 b is formed witha predetermined interval on the third upper surface 456 to be separatedphysically each other.

[0124] A plurality of first openings 452 b is formed on the tenth sidesurface 452 so that both the first board 120 and the lamp body 111 areinserted into the first grooves 456 b.

[0125] A first slot 452 c is formed on the tenth side surface 452 inparallel with the bottom face 210 of the bottom chassis 200 so that thereflection plate 500 is inserted into the tenth side surface 452.

[0126]FIG. 6 is a perspective view showing the light showing a bottomsurface of an assembled structure of the lamp assembly-fixing block andthe light assembly of FIGS. 1 and 5A.

[0127] Referring to FIG. 6, the third bottom surface 455 of the firstlamp assembly-fixing block 450 has a plurality of 10th engaging holes455 a.

[0128] Each of the tenth engaging holes 455 a is formed on the thirdbottom surface 455 and corresponds to each of the fifth engaging holes213 (in FIG. 4A), third screws 455 b engage the tenth engaging holes 455a with the fifth engaging holes 213.

[0129] The second lamp assembly-fixing block 490 is formed in parallelto the fourth edge formed by the bottom face 210 of the bottom chassis200 and the fourth sidewall 228.

[0130] Referring again to FIG. 5B, the second lamp assembly-fixing block490 includes a thirteenth side surface 491, a fourteenth side surface492, a fifteenth side surface 493, a sixteenth side surface 494, afourth bottom surface 495 facing the bottom face 210 of the bottomchassis 200, and a fourth upper surface 496 facing the fourth bottomsurface 495.

[0131] The thirteenth side surface 491 contacts tightly to the fourthsidewall 228 of the bottom chassis 200 (in FIG. 4A), the fourteenth sidesurface 492 faces the thirteenth side surface 491.

[0132] The fifteenth side surface 493 contacts tightly to the firstsidewall 222 of the bottom chassis 200, the sixteenth side surface 494contacts tightly to the second sidewall 224 of the bottom chassis 200.

[0133] The fourth upper surface 496 has second through-holes 496 a andsecond grooves 496 b. The second grooves 496 b receive the second board130 of the light assembly 100.

[0134] The second connector 139 of the second board 130 (in FIG. 1) isinserted into each of the second through-holes 496 a. The fourth bottomsurface 495 is communicated with the fourth upper surface 496 by thesecond through-holes 496 a such that the second terminal 145 is coupledto the second connector 139 of the second board 130.

[0135] The second grooves 496 b are communicated with the secondthrough-holes 496 a, and are formed on the fourth upper surface 496toward the fourth bottom surface 495 to have a predetermined depth.

[0136] The second grooves 496 b receive the second board 130 with a highoperating voltage and insulate the second board 130.

[0137] The number of the second grooves 496 b is the same as the numberof the second boards 130. Each of the second grooves 496 b is formedwith a predetermined interval on the fourth upper surface 496 to beseparated physically each other.

[0138] A plurality of second openings 492 b is formed on the fourteenthside surface 492 so that both the third board 130 and the lamp body 111are inserted into the first grooves 496 b.

[0139] A second slot 492 c is formed on the fourteenth side surface 492in parallel with the bottom face 210 of the bottom chassis 200 so thatthe reflection plate 500 is inserted into the fourteenth side surface492.

[0140] Referring again to FIG. 6, the fourth bottom surface 495 of thesecond lamp assembly-fixing block 490 has a plurality of eleventhengaging holes 495 a.

[0141] Each of the eleventh engaging holes 495 a is formed on the fourthbottom surface 495 and corresponds to each of the sixth engaging holes214 (in FIG. 4A), fourth screws 495 b engage the eleventh engaging holes495 a with the sixth engaging holes 214.

[0142] Referring again to FIG. 5A and FIG. 6, the reflection plate 500has a seventh edge 510, an eighth edge 520, a ninth edge 530 and a tenthedge 540.

[0143] The seventh edge 510 is extended upward to the first steppedportion 357 along the second side surface 352 of the first opticalsheet-fixing block 350 (in FIG. 4A).

[0144] The ninth edge 530 is opposite to the seventh edge 510, and isextended upward to the second stepped portion 397 along the sixth sidesurface 392 of the second optical sheet-fixing block 390 (in FIG. 4A).

[0145] The eighth edge 520 is inserted into the first slot 452 c of thefirst lamp assembly-fixing block 450 to be fixed thereto, and the tenthedge 540 is inserted into the second slot 492 c of the second lampassembly-fixing block 490 to be fixed thereto.

[0146] The reference numeral 550 represents a lamp-fixing member forpreventing each of the lamps 110 of the lamp assembly 100 from moving.The reference numeral 555 represents a projection formed at thelamp-fixing member 550 so as to prevent an optical sheet from beingdeflected.

[0147]FIG. 7A is a perspective view showing an assembled structure ofthe reflection plate 500, the lamp assembly-fixing block 400, and thelamp assembly 100 according to the second exemplary embodiment of thepresent invention. FIG. 7B is an enlarged view of ‘A’ in FIG. 7A.

[0148] Referring to FIG. 7A and FIG. 7B, the first board 120 is insertedinto each of the first grooves 456 b, and the second board 130 isinserted into each of the second grooves 456 b.

[0149]FIG. 8 is a perspective view showing an assembled structure of aninsulated frame, the reflection plate, the lamp assembly-fixing block,and the light assembly according to the second exemplary embodiment ofthe present invention, and FIG. 9 is an exploded perspective view ofFIG. 8.

[0150] Referring to FIG. 8 and FIG. 9, an insulated frame 600 preventsthe first and second boards 120 and 130 from being separated from thefirst and second grooves 456 b and 496 b, respectively. In addition, theinsulated frame 600 insulates the first and second boards 120 and 130.

[0151] The insulated frame 600 includes a first insulated frame 650 anda second insulated frame 690.

[0152] As shown in FIGS. 8 and 9, the first insulated frame 650 includesa first frame body 610 and a seventeenth side surface 620.

[0153] The first frame body 610 covers the third upper surface 456 ofthe first lamp assembly-fixing block 450 (in FIG. 7A).

[0154] The seventeenth side surface 620 is extended from an edge of thefirst frame body 610, and is bent to cover the tenth side surface 452 ofthe first lamp assembly-fixing block 450.

[0155] The first frame body 610 has a third stepped portion 640connected to the first stepped portion 357 of the first opticalsheet-fixing block 350 (in FIG. 4B).

[0156] The first frame body 610 may have selectively twelfth engagingholes 645. The twelfth engaging holes 645 are engaged with the thirdupper surface 456 of the first lamp assembly-fixing block 450 by meansof fifth screws 645 a.

[0157] The seventeenth side surface 620 has third openings 630 so thatthe lamp body 111 of each of the lamps 110 is inserted into each of thethird openings 630.

[0158] The second insulated frame 690 includes a second frame body 660and an eighteenth side surface 670.

[0159] The second frame body 660 covers the fourth upper surface 496 ofthe second lamp assembly-fixing block 490.

[0160] The eighteenth side surface 670 is extended from an edge of thesecond frame body 660, and is bent to cover the fourteenth side surface492 of the second lamp assembly-fixing block 490.

[0161] The second frame body 660 has a fourth stepped portion 680connected to the second stepped portion 397 of the second opticalsheet-fixing block 390 (in FIG. 4B).

[0162] The second frame body 660 may have selectively thirteenthengaging holes 685. The thirteenth engaging holes 685 are engaged withthe fourth upper surface 496 of the second lamp assembly-fixing block490 by means of sixth screws 685 a.

[0163] The eighteenth side surface 670 has fourth openings 675 so thatthe lamp body 111 of each of the lamps 110 is inserted into each of thefourth openings 675.

[0164]FIG. 10 is a perspective view showing the light-supplying moduleaccording to the second exemplary embodiment of the present invention,FIG. 11 is a cross-sectional view taken along B-B of FIG. 10, and FIG.12 is a cross-sectional view taken along C-C of FIG. 10.

[0165] Referring to FIG. 10, FIG. 11 and FIG. 12, the lamp assembly 100is coupled to the first and second lamp assembly-fixing blocks 450 and490. The first and second insulated frames 650 and 690 are coupled tothe first and second lamp assembly-fixing blocks 450 and 490 by means ofthe twelfth engaging holes 645, the thirteenth engaging holes 685 andthe fifth and sixth screws 645 a and 685 a. The combined structure ofthe lamp assembly 100, the first and second lamp assembly-fixing blocks450 and 490, and the first and second insulated frames 650 and 690 arereceived in the receiving space of the bottom chassis 200, to therebycomplete a light-supplying module 700.

[0166]FIG. 13 is a schematic view showing a liquid crystal displaydevice according to a third exemplary embodiment of the presentinvention.

[0167] Referring to FIG. 13, a liquid crystal display device 1000includes the light-supplying module 700, a light distribution-changingmodule 800, a first engaging member 750, a display module 900, a secondengaging member 950 and a third engaging member 970.

[0168] The light-supplying module 700 generates a first light fordisplaying images.

[0169] The light distribution-changing module 800 receives the firstlight generated from the light-supplying module 700 and improves theoptical characteristics of the first light to output a second light, tothereby improve display quality of the liquid crystal display device1000.

[0170] The light distribution-changing module 800 is coupled to thelight-supplying module 700 by means of the first engaging member 750.

[0171] The display module 900 receives the second light that has theimproved optical characteristics, and changes the second light to athird light having image information.

[0172] The display module 900 is coupled to the lightdistribution-changing module 800 by means of the second engaging member950.

[0173] The display module 900, the light distribution-changing module800 and the light-supplying module 700 are coupled to each other bymeans of the third engaging member 970, to thereby complete the liquidcrystal display device 1000.

[0174] Therefore, each component of the liquid crystal display device1000 having above structure may be easily separated and replaced, andthus the device 1000 may be easily repaired.

[0175]FIG. 14 is a schematic view showing the liquid crystal displaydevice divided into a first part having the light-supplying module and asecond part having the light distribution-changing module and thedisplay module of FIG. 13.

[0176] Referring to FIG. 14, the first engaging member 750 and the thirdengaging member 970 are disassembled from the liquid crystal displaydevice 1000 such that the light-supplying module 700 is divided from thelight distribution-changing module 800 and the display module 900. Thedisplay module 900 has fifth openings 770 through which the firstengaging member 750 passes, thereby exposing the exterior of the liquidcrystal display device 1000. Therefore, only the light-supplying module700 may be divided from the liquid crystal display device 1000. Thus,the liquid crystal display device 1000 according to the presentinvention may easily replace an exhausted component, such as a lampassembly and the like, with a new component.

[0177]FIG. 15 is a schematic view showing the liquid crystal displaydevice 1000 divided into the light-supplying module, the lightdistribution-changing module and the display module of FIG. 13.

[0178] Referring to FIG. 15, the first engaging member 750, the secondengaging member 950 and the third engaging member 970 are disassembledfrom the liquid crystal display device 1000 such that thelight-supplying module 700, the light distribution-changing module 800and the display module 900 are divided.

[0179] When the light-supplying module 700, the lightdistribution-changing module 800 and the display module 900 are divided,users may more easily disassemble and replace the components of thelight-supplying module 700, such as the lamp assembly 100, thecomponents of the light distribution-changing module 800, such as anoptical sheet, and the components of the display module 900, such as anLCD panel.

[0180] Hereinafter, detailed descriptions about the lamp assembly andthe light-supplying module will not be given because they are alreadyexplained in the first and second exemplary embodiments of the presentinvention.

[0181]FIG. 16 is an exploded perspective view showing the lightdistribution-changing module 800 of FIG. 13, FIG. 17 is across-sectional view showing a first optical sheet-fixing chassis ofFIG. 16.

[0182] The light distribution changing module 800 includes first andsecond optical sheet-fixing chassis 810 and 830, and an optical sheet820. Referring to FIG. 16 and FIG. 17, the first optical sheet-fixingchassis 810 includes a first chassis body 802, a second chassis body 804and a third chassis body 806.

[0183] The third chassis body 806 has a frame shape having a sixthopening 803, and is disposed in parallel to the bottom face 210 of thebottom chassis 200.

[0184] The first chassis body 802 is mounted the first and secondstepped portions 357 and 397 which are formed on the first and secondupper surfaces 356 and 396 (in FIG. 4B), and the third and fourthstepped portions 640 and 680 which are formed on the first and secondinsulated frames 650 and 690 (in FIG. 8).

[0185] A plurality of fourteenth engaging holes 808 is formed with apredetermined interval on the first chassis body 802.

[0186] The second chassis body 804 is extended to the base of the firstand second stepped portions 357 and 397 which are formed on the firstand second upper surfaces 356 and 396, and the base of the third andfourth stepped portions 640 and 680 which are formed on the first andsecond insulated frames 650 and 690, along the inner surface of thefirst chassis body 802.

[0187] The third chassis body 806 is extended from the edge of thesecond chassis body 804, to bottom surfaces of the first and secondstepped portions 357 and 397 and the bottom surfaces of the third andfourth stepped portions 640 and 680, to thereby be mounted the bottomsurfaces of the first and second stepped portions 357 and 397 and thebottom surfaces of the third and fourth stepped portions 640 and 680.

[0188]FIG. 18 is a cross-sectional view showing an assembled structureof the first optical sheet-fixing chassis, the optical sheet and thesecond optical sheet-fixing chassis according to the third exemplaryembodiment of the present invention. FIG. 19 is a perspective viewshowing the second optical sheet-fixing chassis of FIG. 18.

[0189] Referring to FIG. 18, the optical sheet 820 is mounted on thethird chassis body 806 of the first optical sheet-fixing chassis 810.The optical sheet 820 includes a prism sheet 822, such as a dualbrightness enhancement film (DBEF), a diffusion sheet 824 and adiffusion plate 826.

[0190] Referring to FIG. 18 and FIG. 19, the second optical sheet-fixingchassis 830 includes a fourth chassis body 832 and a first chassis sidesurface 834.

[0191] The fourth chassis body 832 has a rectangular frame shape havinga seventh opening 833 so as to cover the first chassis body 802 of thefirst optical sheet-fixing chassis 810.

[0192] The fourth chassis body 832 has a plurality of projections 836for preventing an LCD panel from moving.

[0193] The fourth chassis body 832 has fifteenth engaging holes 838 sothat the fourth chassis body 832 is combined with the first opticalsheet-fixing chassis 810 by means of seventh screws 837.

[0194] In addition, the fourth chassis body 832 has sixteenth engagingholes 839 so as to be combined with a fixing member for fixing theliquid crystal display panel 1000.

[0195] The first chassis side surface 834 is extended in parallel to thefirst, second, third and fourth sidewalls 222, 224, 226 and 228 of thebottom chassis 200 from an edge of the fourth chassis body 832.

[0196] The first chassis side surface 834 has a plurality of seventeenthengaging holes 834 a at a predetermined interval. A plurality ofeighteenth engaging holes 834 b is formed on an upper part of theseventeenth engaging holes 834 a.

[0197] The first engaging member 750 is engaged with the seventeenthengaging holes 834 a formed on the first chassis side surface 834, andthe eighth engaging holes 220 a formed on the first, second, third andfourth sidewalls of the bottom chassis 200.

[0198]FIG. 20 is a perspective view showing an assembled structure ofthe light distribution-changing module and the display module accordingto the third exemplary embodiment of the present invention. FIG. 21 isan exploded cross-sectional view showing the assembled structure of FIG.20.

[0199] Referring to FIG. 20 and FIG. 21, an LCD panel assembly 910 ofthe display module 900 includes a TFT substrate 906, liquid crystal 904,a color filter substrate 902 and a driver module (not shown).

[0200] The LCD panel assembly 910 according to the present invention isnot confined to the structure shown in FIG. 20 and FIG. 21, and thestructure and the driving method of the LCD panel assembly 910 may bevaried.

[0201] As shown in FIG. 20, a fixing chassis 930 for fixing the liquidcrystal display panel includes a fifth chassis body 932 and a secondchassis side surface 934.

[0202] The fifth chassis body 932 has a rectangular frame shape havingan inner edge and an outer edge, and presses edges of the LCD panelassembly 910 mounted on the fourth chassis body 832.

[0203] The fifth chassis body 932 has nineteenth engaging holes 933 soas to be combined with the fourth chassis body 832.

[0204] The second engaging member 950 is engaged with the nineteenthengaging holes 933 and the sixteenth engaging holes 839 formed on thefourth chassis body 832.

[0205] The second chassis side surface 934 is extended in parallel tothe first, second, third and fourth sidewalls 222, 224, 226 and 228 ofthe bottom chassis 200 (in FIG. 4A) from the outer edge of the fifthchassis body 932.

[0206] The second chassis side surface 934 has twentieth engaging holes936. The twentieth engaging holes 936 are engaged with the first,second, third, fourth sidewalls 222, 224, 226 and 228 of the bottomchassis 200 and the first chassis side surface 834.

[0207] The third engaging member 970 is engaged with the twentiethengaging holes 936 formed on the second chassis side surface 934, theninth engaging holes 220 b formed on the first, second, third, fourthsidewalls 222, 224, 226 and 228 of the bottom chassis 200, and theeighteenth engaging holes 834 b formed on the first chassis side surface834, to thereby complete the liquid crystal display device 1000.

[0208] This invention has been described with reference to the exemplaryembodiments. It is evident, however, that many alternative modificationsand variations will be apparent to those having skill in the art inlight of the foregoing description. Accordingly, the present inventionembraces all such alternative modifications and variations as fallwithin the spirit and scope of the appended claims.

What is claimed is:
 1. A lamp assembly comprising: at least two lamps, each of the lamps including: a lamp body including a fluorescent layer formed on an inner surface of the lamp body and a discharge gas disposed in the lamp body; a first electrode for providing the lamp body with a first discharge voltage; and a second electrode for providing the lamp body with a second discharge voltage; and a first board, coupled to the first electrode, for providing the first electrode with the first discharge voltage.
 2. The lamp assembly of claim 1, wherein the first board comprises: a first insulated body; at least one first conductive pattern electrically connected to the first electrode of each of the lamps; and at least two first through-holes formed on the first insulated body, each of the first through-holes receiving the first electrode of each of the lamps.
 3. The lamp assembly of claim 2, further comprising: a first connector installed on the first conductive pattern; and a first terminal, coupled to the first conductive pattern through the first connector, for receiving the first discharge voltage.
 4. The lamp assembly of claim 3, wherein the first terminal is connected to an inverter for generating the first discharge voltage.
 5. The lamp assembly of claim 2, wherein the first electrode received in each of the first through-holes and the fist conductive pattern are soldered and electrically connected to each other.
 6. The lamp assembly of claim 1, further comprising a first lamp holder for preventing the first electrode from moving, an end of the first lamp holder being connected to the first board.
 7. The lamp assembly of claim 1, further comprising a second board, coupled to the second electrode, for providing the second electrode with the second discharge voltage.
 8. The lamp assembly of claim 7, wherein the second board comprises: a second insulated body; at least one second conductive pattern electrically connected to the second electrode of each of the lamps; and at least two second through-holes formed on the second insulated body, each of the second through-holes receiving the second electrode of each of the lamps.
 9. The lamp assembly of claim 8, further comprising: a second connector installed on the second conductive pattern; and a second terminal, coupled to the second conductive pattern, for receiving the second discharge voltage.
 10. The lamp assembly of claim 9, wherein the second terminal is connected to an inverter for providing the second terminal with the second discharge voltage.
 11. The lamp assembly of claim 8, wherein the second electrode received in each of the second through-holes and the second conductive pattern are soldered and electrically connected to each other.
 12. The lamp assembly of claim 7, further comprising a second lamp holder for preventing the second electrode from moving, an end of the second lamp holder being connected to the second board.
 13. The lamp assembly of claim 1, wherein the number of the lamps is four.
 14. A light supplying apparatus comprising: a receiving container including a bottom face, a first side wall, a second side wall facing the first side wall, a third sidewall and a fourth sidewall facing the third side wall, each of the sidewalls being extended from an edge of the bottom face to form a receiving space; first and second lamp assembly-fixing members disposed on the bottom face of the receiving container, the first lamp assembly-fixing member being adjacent to the first sidewall, the second lamp assembly-fixing member being adjacent to the second sidewall, the first and second lamp assembly-fixing members having a bar shape, and first and second recesses being formed on upper faces of the first and second lamp assembly-fixing members, the upper faces being opposite to the bottom face of the receiving container; a reflection member partially inserted into a slot of the first and second lamp assembly-fixing members and being opposite to the bottom face of the receiving container; a lamp assembly, including: first and second boards, the first and second boards being inserted into the first and second recesses of the first and second lamp assembly-fixing members, respectively; and a lamp having first and second electrodes, the first and second electrodes being connected with the first and second boards, respectively; and first and second insulated members for covering the first and second lamp assembly-fixing members, respectively, and for insulating the first and second boards.
 15. The light supplying apparatus of claim 14, further comprising first and second optical sheet-fixing members disposed on the bottom face of the receiving container, the first optical sheet-fixing member being adjacent to the third sidewall, the second optical sheet-fixing member being adjacent to the fourth sidewall, the first and second optical sheet-fixing members having a bar shape.
 16. The light supplying apparatus of claim 15, wherein each of the first and second optical sheet-fixing members has a first stepped portion, and the first stepped portion is extended in a longitudinal direction of each of the first and second optical sheet-fixing members, to receive at least one optical sheet.
 17. The light supplying apparatus of claim 14, wherein a plurality of engaging holes is formed on the first sidewall, the second sidewall, and the first and second lamp assembly-fixing members.
 18. The light supplying apparatus of claim 14, wherein each of the first and second lamp assembly-fixing members is engaged with the reflection member by a screw.
 19. The light supplying apparatus of claim 14, further comprising first and second connectors, installed at the first and second boards, for receiving a first discharge voltage and a second discharge voltage, respectively.
 20. The light supplying apparatus of claim 19, wherein a plurality of openings is formed on portions of the bottom face and the first and second lamp assembly-fixing members corresponding to the first and second connectors, and wherein the lamp further includes a first terminal and a second terminal passing through the openings to be connected to the first and second connectors.
 21. The light supplying apparatus of claim 14, wherein a second stepped portion is formed on an upper surface of each of the first and second insulated members in a longitudinal direction of each of the first and second insulated members to receive at least one optical sheet.
 22. A liquid crystal display device comprising: a light supplying member, including: a lamp assembly for generating a first light; and a receiving container having a bottom face for receiving the lamp assembly, and a plurality of sidewalls; a light distribution-changing member, including: an optical sheet for changing optical distribution of the first light to produce a second light; a first optical sheet-fixing member for receiving an edge of a bottom face of the optical sheet; a second optical sheet-fixing member having first and second faces, the first face pressing an edge of an upper face of the optical sheet, and the second face being bent down to be connected one of the sidewalls of the receiving container; and a first engaging member for engaging the first optical sheet-fixing member with the second optical sheet-fixing member; a second engaging member for engaging one of the sidewalls of the receiving container with the second face of the second optical sheet-fixing member; a display unit, including: a liquid crystal display panel, disposed on the first face of the second optical sheet-fixing member to be opposite to the optical sheet, for changing the second light into a third light having image information; and a fixing member for fixing the liquid crystal display panel, the fixing member having a third face and a fourth face, the third face pressing an edge of the liquid crystal display panel, and the fourth face being bent to be connected to one of the sidewalls of the receiving container; a third engaging member for engaging the first face of the second optical sheet-fixing member with the third face of the fixing member; and a fourth engaging member for engaging one of the sidewalls of the receiving container, with the second face of the second optical sheet-fixing member and the fourth face of the fixing member.
 23. The liquid crystal display device of claim 22, wherein the first engaging member comprises at least one first through-hole and a first screw, the first through-hole penetrating the first and second optical sheet-fixing members, and the first screw being engaged with the first through-hole.
 24. The liquid crystal display device of claim 22, wherein the second engaging member comprises a second through-hole and a second screw, the second through-hole penetrating one of the sidewalls of the receiving container and the second face of the second optical sheet-fixing member, and the second screw being engaged with the second through-hole.
 25. The liquid crystal display device of claim 22, wherein the third engaging member comprises a third through-hole and a third screw, the third through-hole penetrating the first face of the second optical sheet-fixing member and the third face of the fixing member, and the third screw being engaged with the third through-hole.
 26. The liquid crystal display device of claim 22, wherein the fourth engaging member comprises a fourth through-hole and a fourth screw, the fourth through-hole penetrating one of the sidewalls of the receiving container, the second face of the second optical sheet-fixing member and the fourth face of the fixing member, and the fourth screw being engaged with the fourth through-hole.
 27. The liquid crystal display device of claim 22, wherein an opening is formed on a portion of the fourth face of the fixing member to expose the second engaging member, and the second engaging member passes through the opening.
 28. The liquid crystal display device of claim 22, wherein the optical sheet comprises a prism sheet and a diffusion sheet, the prism sheet being adjacent to the liquid crystal display panel, the diffusion sheet being adjacent to the lamp assembly. 